Mark Shaffer, MD
NPI 1639308380 · Family Medicine Physician · Winnsboro, SC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Shaffer, MD is a Family Medicine Physician provider in Winnsboro, SC (NPI 1639308380).
Provider details
- NPI number
- 1639308380
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 31836 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
118 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 57 | $78 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 24 | $118 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 14 | $80 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 12 | $96 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $130 |
Typical Medicare-allowed amounts for these services range $78–$130 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 71 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 154 | 51 |
| Atorvastatin Calcium | 147 | 57 |
| Semaglutidebrand: Ozempic | 92 | 24 |
| Metformin Hclbrand: Metformin Hcl Er | 80 | 28 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 76 | 25 |
| Dapagliflozin Propanediolbrand: Farxiga |
Practice location
Mailing address
Additional practice locations (2)
- 3209 Colonial DrFamily MedicineColumbia, SC 29203-6930Phone: (803) 434-6113Fax: (803) 434-7231
- 3209 Colonial DrFamily MedicineColumbia, SC 29203-6930Phone: (803) 434-6113Fax: (803) 434-7231
Registry dates
- Enumerated
- 2009-07-02
- Last updated
- 2021-06-25
- Certified
- 2021-06-22
Frequently asked questions
- What is Mark Shaffer's NPI number?
- Mark Shaffer's National Provider Identifier (NPI) is 1639308380, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Shaffer's specialty?
- Mark Shaffer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Shaffer located?
- Mark Shaffer's practice location on file with NPPES is 56 US Highway 321 Byp N, Winnsboro, SC 29180-7100.
- What is Mark Shaffer's phone number?
- The practice phone number listed in the NPPES registry for Mark Shaffer is (803) 635-6099.
- Does Mark Shaffer accept Medicare?
- Mark Shaffer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Shaffer's NPI active?
- Yes — Mark Shaffer's NPI (1639308380) is active in the NPPES registry as of the last update on 2021-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.